Means for connecting internal combustion engines to suction motors



F.) H. STROUP Oct. 25, 1938.

MEANS FOR CONNECTING INTERNAL COMBUSTION ENGINES TO SUCTION MOTORS Filed April 26, 1937 FIG 3 n I 8 I I FIG.4.

INVENTOR y H. 51' ROUP BY ATTORNEY.

Patented Oct. 25, 1938 uni-TED: STATESiiJ pmjem ;0mm

2,134;215 3:1 MEANS FOR CONNECTING .INTERNABGoMw' BUSTION ENGINES 'TO SUCTION MOTORS FredH. stroumwKirkwood, Mo'.",'assignor'to Wag-i=2:-

ner'Electric Corporation, St. Louis, -Mo-.; a cor-1 poration of Delaware i i Application- April 26, 1937, Serial-No. 138390 6 Claims. (01. 60)',-:

My invention relates to suction-operated mechanism and more particularly to means for connecting said mechanism'to the intake'manifold of an internal combustion engine.

1 One of the objects of my invention is to pro-V vide improved means for connecting a suction motor to the intake'manifold of an internal combustion engine wherebythe operation of the suction motor willnot adversely affect. the'operation of the. engine during the introduction of air into the manifold; 7

Another object of m'yinvention isto associate an expansionichamber. with the portion of the intake manifold which is connected to a suction-" operated motor'to thereby cause a decrease in the density of the air prior'to itspassage into the; intake manifold and'its'mixingwith thecarbureted mixture. 7 7

Stillanother object of my'invention" is to ass'ociate with'the intake manifold of an internal combustionengine means for more evenly distributing-the air introducedinto the manifold fromthe suction motor."

Other objects "of my'invention will become'apparent from the following description takenrin connection with the accompanyingJdrawing in which Figured is aside viewof aportion of the intake" manifold: and 1 carburetor. having asso ciated, therewith an embodiment of my'invention;

EigureZ is a cross-sectional view taken on the lined- 2 of Figure "1, showing theinlet spacer; Figure'3' is across-sectional view'of the spacer taken on the line 33 of Figure 2; and "Figure 4 is a view similar to that of Figurehs'howinga modifiedconstruction; 1 n V Referring to Figures 1, 2, and 3; thereference character I. indicatesa portionof an internal combustion'engineandi the intake manifold for saidenginewhich has an inlet pipe 3 fortaS- sociation with'the icarburetor' 4. Between the inlet pipe' and 'the "carburetor is interposed a spacer member 5 suitably'secured to flanges. on the carburetor" and theinlet pipe by means of 7 bolts '6. Thi's"spacer member is provided with two passages "l and 8 which are" alignedwith'simimotor T 1-3, "the" condu t being"providedi with a valve M for controlling communication between the motor and chamber 9.

The suction. 'motor and valve are only diagrammatically shown and j may be anyone of anum'berof types, as for examplefa vcontrol valve "and power cylinder'for operatingraclutch or a brakemechanism, 'or a".

reversingtvalve 'and'motor for operating a com-' pressor'for' compressing'air'for use'as aisource of power to operate different mechanisms which are. 7

found. on an "automobile "or other structure. ,A portion :of the chamber opposite. that .towhich conduittlZ is connected is in communication with the expansion chamber l5 by means of a passageway 16, this 'expansion' chamber being screwed into a suitable boss I1 on the spaced member.

The: chamber". [5 may be "of difie'rent sizes, depending upon thetype and size .of the suction motor associatedlwiththe manifold,vits capacity,

however, "being in fexcesswjof that-of chamber 9 which. surrounds and communicates with .pas-

sagesrlandfll, Y 1 g In the'operation'of the mechanism just describedfwhenpthe' suction motor" is inoperative,

i expansioniohamber' l5 will havethe samedegree of vacuumas that of the'intake' manifold during all conditions 'of operation of the engine since 1 this chamber is in constant communication with ,passagesl and 8 by means of openings 10 and. II. If the'suction motor is now operatedi'by i proper controllof valve I4, the air in the suction motorzwill be immediately drawn into chamber I.

9 because of its vacuum condition. This air, in-wtstead of being drawn directly into passages 1 and I J 8 throughlwhich the carbureted mixture flows to the cylinders of theengine as would. be the case if conduit l2v were connecteddirectly to thepassages is discharged into chamber 9, Since the expansionlichambernw is directlyconnected to chamber-b9, thew-degree of vacuum therein decreases wand-a portion--. of the air which enters chamberell fromthe suction motor will also enter the expansion; chamber. .The air under atmosphericrpressure coming-(from the suction motor -Wi1l,lfihGIBfOI'BZbBCOmE rarefied, that is, decreased e in densitye andireduc'edin pressure :prior -to its entry into passages I and 8 through openings l0 and II. This rarefied air will enter passages I and 8 at different points about their walls due' to the spacing of openings l0 and II and thus will mix with the carbureted mixture flowing to the cylinders of the internal combustion engine. The operation of the engine will thus not be seriously affected by any excess unmixed air being introduced into one or more of the engine cylinders.

When the suction motor is employed to actuate the compressing piston of an air compressor, the motor will be subject to intermittent operation, and the expansion chamber l5, besides causing a rarefication of the air coming from the suction motor, will also smooth out or dampen the pulsations caused by the intermittent fiow of air from the suction motor to the manifold. In other words, if the expansion chamber were not present and conduit l2 directly connected to inlet pipe 3 of the manifold, the intermittent charges of air resulting from the operation of the suction motor during the compressor operation will cause the carbureted mixture to vary in-density each time air is introduced into the inlet pipe and, as a result, there would be uneven operation of the engine ordinarily termed rolling. This rolling would be in timed relation with theoperation of the suction motor. By the use of the expansion chamber l5, chamber 9, and spaced openings communicating with passages l and 8, the intermittent flow of air from the suction motor during its operation is caused to have a fairly even flow into the inlet pipe as expansion chamber l5 and chamber 9 decrease the density of the air, and passages l and II tend to introduce this rarefied air into passages I and 8 at a uniform rate.

It is not necessary for expansion chamber l to be placed upon the side of the spacer opposite that to which conduit I2 is connected. In Figure 4 I have shown the expansion chamber [5' as being interposed between conduit l2 and chamber 9 of the spacer member. When thesuction motor is inoperative, this expansion chamber has the same degree of vacuum as the inlet pipe of the manifold. Whenthe suction motor is operated, the air therefrom'is first introduced into expansion chamber l5 and chamber 9 where its density is decreased prior to being evenly distributed into passages I and 8 through openings I0 and II. Thus chamber IS, in this position, acts in the same manner as does chamber l5 of the structure shown in Figure 1, and the operation of the engine is not affected while the suction motor is being operated.

Being aware of the possibility of modifications in the particular structure herein described without departing from the fundamental principles of my invention, I do not intend that its scope be limited except as set forth by the appended claims.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In apparatus of the class described, the combination of an intake manifold passage of an internal combustion engine, means forming a chamber surounding said passage, said chamber communicating with said passage by means of restricted openings through the wall thereof, a suction motor, a conduit for placing the motor in communication with the chamber, and an expansion chamber in constant communication with the chamber surrounding the manifold-passage.

2. In apparatus of the class described, the combination of an intake manifold passage of an internal combustion engine, means forming a chamber surrounding said passage, said chamber communicating with said passage by means of restricted openings through the wall thereof, a suction motor, a conduit for placing the motor in communication with the chamber, and an expansion chamber in constant communication with the chamber surrounding the manifold passage, said expansion chamber having a volumetric capacity exceeding that of the first mentioned chamber.

3. In apparatus of the class described, the

combination of an intake manifold passage of an internal combustion engine, means forming a chamber surrounding said passage, said chamber communicating with said passage by means of a retsricted opening through the wall thereof, an expansion chamber in constant communication with one side of said chamber surrounding the manifold passage and having a Volumetric capacity exceeding that of said chamber surrounding the passage, a suction motor, and a conduit for placing said motor in communication with the chamber surrounding the passage and on the side oppositethat with which the expansion chamber communicates.

4. In apparatus of the class described, the combination of an intake manifold passage of an internal combustion engine, means forming a chamber surrounding said passage, said chamber communicating with said passage by means of a restricted opening through the wall thereof, an expansion chamber in constant communication with said chamber surrounding the manifold passage and having a volumetric capacity exceeding that of said chamber surrounding the passage, a suction motor, and a conduit connecting the motor with the expansion chamber.

5. In apparatus of the class described, the combination of an intake manifold of an internal combustion engine, a carburetor, a member interposed betweenthe carburetor and the intake manifold and having an opening in alignment with the outlet of the carburetor and the inlet of the manifold, means forming a chamber in the wall of said member and surrounding the opening, said wall being provided with spaced restricted connecting passages for placing the for placingsaid motor in .communication with the wall chamber.

6. In apparatus of the class described, the combination of a fuel intake passage of an internal combustion engine, a suction-operated motor, conduit means including a restricted opening in the Wall of the intake passage for connecting the suction motor with the passage, and means forming an expansion chamber in constant communication with said intake passage through said restricted opening.

- FRED H. STROUP. 

